# Codebook — MBI

| Variable | Type | Description |
|---|---|---|
| study_id | string | Study ID |
| intervention_type | string | MBI type |
| n_participants | int | Sample size |
| duration_weeks | int | Duration (weeks) |
| anxiety_pre | float | HAM-A pre-intervention |
| anxiety_post | float | HAM-A post-intervention |
| effect_size_d | float | Cohen's d |
